Interphase chromosomes are about______ times less compact than mitotic chromosomes, but still are about______ times more compact than a DNA molecule in its extended form
(a) 10, 1000
(b) 20, 500
(c) 5, 2000
(d) 50, 200
(b)
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Strenuous exercise lowers the blood pH, causing the curves for both hemoglobin and myoglobin to shift to the right. This shift results in
(A) an unloading of O2 at higher partial pressures (B) an increase in the number of O2-binding sites (C) the capture of more O2 by hemoglobin (D) the capture of more O2 by myoglobin
Which term refers to the movement of some molecules and ions out of the excretory system tubules and back into body fluids?
a. reabsorption b. release c. filtration d. secretion
The oldest fossils are those of tiny bacteria, which are classified as prokaryotes. Why are these organisms classified as prokaryotes?
A) They are single-celled organisms that lack internal membrane-bound compartments. B) They consist of cells that lack any genetic information. C) They are the first organisms that appeared on Earth. D) They are single-celled organisms that no longer exist on Earth.
On what basis does forensic biotechnology distinguish one individual from another?
A) A small tandem repeat in one person will be in a different location in the genome of another person. B) Different people will have completely different genomes. C) Different people will have a different number of tandem repeats at the same location in their genomes. D) Different people will have different mutations in their short tandem repeats.